71530717 has 2 divisors, whose sum is σ = 71530718. Its totient is φ = 71530716.

The previous prime is 71530681. The next prime is 71530769. The reversal of 71530717 is 71703517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39200121 + 32330596 = 6261^2 + 5686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71530717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71530777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35765358 + 35765359.

It is an arithmetic number, because the mean of its divisors is an integer number (35765359).

Almost surely, 2^71530717 is an apocalyptic number.

It is an amenable number.

71530717 is a deficient number, since it is larger than the sum of its proper divisors (1).

71530717 is an equidigital number, since it uses as much as digits as its factorization.

71530717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5145, while the sum is 31.

The square root of 71530717 is about 8457.5834018944. The cubic root of 71530717 is about 415.1109530594.

The spelling of 71530717 in words is "seventy-one million, five hundred thirty thousand, seven hundred seventeen".